Abstract: An aircraft arrangement is provided, the aircraft arrangement including a first aircraft component for converting at least one input vibration into an output vibration suitable for driving an energy harvester, and an energy harvester coupled to the first aircraft component and configured to generate electrical energy in response to the output vibration of the first aircraft component, the first aircraft component including a three-dimensional lattice structure including a multiplicity of unit cells, the unit cells including multiple lattice-forming members, the unit cells having a mean greatest dimension of at least 10 nm.

Abstract: To additively manufacturing an object, a powder bed is built by depositing a series of layers of powder. For at least some of the layers, before a next layer in the series is deposited: the powder of the layer in inspected by performing an x-ray scan of at least some of the powder of the layer to detect whether or not a contaminant is present in the powder of the layer, and a selected part of the powder of the layer is fused in accordance with a three-dimensional model of the object.